Written Question·Department for Transport·UIN 95696

Motor Vehicles: Exhaust Emissions

Tabled: 1 December 2025

Answered: 9 December 2025

Question

Helen Hayes

To ask the Secretary of State for Transport, whether her Department is taking steps with the Department for Transport to improve emissions monitoring and enforcement mechanisms to prevent future breaches of vehicle emissions law.

Answer

Simon Lightwood

Since 2016, the Department has greatly increased oversight of emissions tests and established the Driver and Vehicle Standards Agency’s (DVSA’s) Market Surveillance Unit (MSU) to test vehicle emissions and investigate suspicious practice in the real world...

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